Crystal structure of paddle-wheel sandwich-type [Cu2{(CH3)2CO}{μ-Fe(η5-C5H4C[triple-bond]N)2}3](BF4)2·(CH3)2CO

The molecular structure of (acetone-κ O )tris(μ-ferrocene-1,1′-dicarbonitrile-κ 2 N : N ′)dicopper(I) bis(tetrafluoridoborate) acetone monosolvate, [Cu 2 Fe 3 (C 6 H 4 N) 6 (C 3 H 6 O)](BF 4 ) 2 ·C 3 H 6 O, consists of two Cu I ions bridged by a ferrocene-1,1′-dicarbonitrile moiety in a paddle-wheel-architectured sandwich complex with two BF 4 − units as counter-ions. One of the latter is equally disordered over two sets of sites. The two Cu I ions are complexed in a trigonal–planar manner by three nitrile N -donor atoms. Further interactions by the O atom of an acetone molecule to one of the Cu I atoms and a weak η 2 ,π-interaction of two atoms of a cyclopentadienyl ring to the other Cu I atom complete a distorted trigonal–pyramidal environment for each of the metal ions. A further acetone molecule is also present as a solvent molecule. The crystal packing is consolidated by several π–π interactions.